Kinda. Maybe grasses cause fungus is generally accepted as the first creator of soil, but It took fungus some 10 million years to figure out how to digest lignin. There’s debate on which first made the metaphorical leap from the water, as we have found some fungi capable of breaking down silicate rocks but plenty of proto plants were living in tidal areas. But fungus was way before lignin, and then we had plenty of time in between the first appearance of lignin and fungus breaking it down.

So trees actually created the fungus we’re most familiar with today.